Bedrock topography of north-central Iowa

IMAP 1080



The bedrock in Iowa (Hershey, 1969) is generally overlain by deposits of glacial drift and alluvium, which range in thickness from less than 1 ft to more than 400 ft, and from less than 1 ft to about 60 ft respectively. The configuration of the bedrock surface is the result of a complex system of ancient drainage courses which were developed during a long period of preglacial erosion and during shorter, but mroe intense, periods of interglacial erosion.

Study Area

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Bedrock topography of north-central Iowa
Series title IMAP
Series number 1080
DOI 10.3133/i1080
Year Published 1978
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Iowa Water Science Center
Description 2 Plates: 26.72 x 35.46 inches and 30.65 x 37.98 inches
Country United States
State Iowa
County Cero Gordo, Butler, Floyd, Franklin, Mitchell, Worth
Scale 25000
Online Only (Y/N) N
Additional Online Files (Y/N) N